export const getmark = () => {
  const setWatermark = (str: any) => {
    const id = "watermark";
    if (document.getElementById(id) !== null) {
      document.body.removeChild(document.getElementById(id)!);
    }
    const can = document.createElement("canvas");
    can.width = 150;
    can.height = 120;
    const cans = can.getContext("2d")!;
    cans.rotate((-15 * Math.PI) / 180);
    cans.font = "18px Vedana";
    cans.fillStyle = "rgba(0,0,0,0.04)";
    cans.textAlign = "left";
    cans.fillText(str, can.width / 8, can.height / 2);
    const div = document.createElement("div");
    div.id = id;
    div.style.pointerEvents = "none";
    div.style.top = "40px";
    div.style.left = "0px";
    div.style.position = "fixed";
    div.style.zIndex = "100000";
    div.style.width = document.documentElement.clientWidth + "px";
    div.style.height = document.documentElement.clientHeight + "px";
    div.style.background =
      "url(" + can.toDataURL("image/png") + ") left top repeat";
    document.body.appendChild(div);
    return id;
  };
  const watermark = (str: string) => {
    let id = setWatermark(str);
    setInterval(() => {
      if (document.getElementById(id) === null) {
        id = setWatermark(str);
      }
    }, 500);
    window.onresize = () => {
      setWatermark(str);
    };
  };
  return { watermark };
};
